Plate depositing table for casting machines



Jan. 2, 1934. H. FRITZ PLATE DEPOSITING TABLE FOR CASTING MACHINES Filed May 20, 1952 Jnven/bn Patented Jan. 2, 1934 UNHTED STATES FFEQE PLATE DEPOSITING TABLE FOR CASTING MACHINES Application May 20, 1932, Serial No. 612,542, and in Germany October 10, 1931 20 Claims.

In casting machines, with a stationary vertical casting mold and a core that is moved to and fro in making hemi cylindrical stereotype plates, the cast plate is deposited from the core on a table. The use of stationary depositing tables is known but they have the disadvantage that they do not insure a safe depositing of the plate. Furthermore, when the casting core is at a standstill in its outward position the lower part of it which is covered by the depositing table cannot very well be cleaned of metal chips or other similar solid scraps. It is an object of my invention to provide a table such as can readily be cleaned.

Another object of my invention is to provide a table upon which a plate can be deposited from the core in simple and convenient manner without danger of injury to the plate.

Another object of the invention is to provide simple and eflicient mechanical means for stripping the plate from the core and depositing it on the table.

Referring to the drawing, which is made a part of this application and in which similar reference characters indicate similar parts:

Fig. 1 is an elevation showing a preferred form of the invention, and

Fig. 2, a plan of the same.

In the particular construction according to the invention the depositing table 11 is held yieldingly against the casting core 1 by spring pressed plungers 12. The stereotype plate 5 is held by the strippers 6, 7, 8, 9 against return movement with the core and it stands on the depositing table 11. The lever 3 pivoted on the bolt 2 has its inner end formed as a toothed segment which meshes with the teeth 4 fitted on the table 11. A spring bolt 10 serves to hold fast the table 11 when drawn backwards.

The invention in the preferred form is eXem-' plified in a stereotype plate casting machine with a stationary vertical casting mold (not shown) and a core which is moved to and fro for vertical casting. After the casting process the casting core 1 with plate 5 sticking to it moves away from the casting mold, the core turning round on its axis and carrying the cast plate 5 to a depositing table 11. The depositing table 11 is so formed that its concave curve closely accommodates itself to the convex curve of the casting core. The plate depositing table is connected with the machine base on which it rests, not rigidly but yieldingly or resiliently so that it may be shifted elastically on the machine base in the direction of the movement of the casting core lengthwise of said base. The table 11 can therefore follow the movements of the casting core for a limitedv distance until after the cast plate has been stripped from the casting core. The casting core therefore, after striking against the yieldingly held depositing table, Will take the 00 table along with it up to the point where the movement is reversed. During this small movement the yieldably supported plate strippers 6, 7, 8 and; 9 are turned by the cast plate round their axes so that they permit free passage of the plate carried by the core. At the reversing point of the movement the strippers are moved inward resiliently behind the plate. Then the core travels from the point where the movement is reversed back towards the casting mold. During this movement the depositing table 11 follows the core owing to the springs pressing against it and pushes itself underneath the plate held fast by the strippers a distance corresponding to the distance which the core travels from the end 7 station towards the casting mold in order to strip off the plate.

My new device insures also a secure depositing of the vertically extending plate on the table.

For the purpose of cleaning the stationary core 30 in its outward position the depositing table is drawn away by hand from the casting core. This may be done for example by fitting grips on the table 11. As an improvement over this arrangement a forked lever whose fork embraces a plug 35 which is made fast in the base flange of the depositing table may be used. In the drawing there is shown a toothed segment lever, which can be turned round a bolt 2, the teeth of which mesh with a rack 4 fastened to the depositing table or with teeth on the base flange. When the depositing table 11 is drawn back it may be held fast by tapered pins or spring bolts. In the drawing there is shown a spring bolt 10 situated in the base of the depositing table 11 which can be forced by spring means into corresponding recessesin the machine base. This fixed position of the depositing table cannot of course be obtained by the movement given to it by the core so that while the machine is running the spring bolt cannot fall into a recess.

Although I have illustrated and described only one form of the invention, I am aware of the fact that modifications can be made therein.

Therefore I do not wish to be limited in this plate receiving table positioned to be engaged by the core and carried along thereby, and resilient means for opposing such movement of the table.

2. A device as in claim 1, combined with means including a rack and a lever operated segment meshing with the rack for withdrawing the table from plate receiving position.

3. A device as in claim 1, combined with means.

for withdrawing the table from plate receiving position, and means for locking the table in withdrawn position.

4. In a casting machine for hemispherical plates having a stationary vertical casting mold,

and a core traveling from the mold to a plate delivering position and back, the combination of a plate receiving table positioned to be engaged by the core and carried along thereby, resilient means for opposing such movement of the table, said table having a concave margin fitting the convex surface of the core and being normally positioned near the point of reversal of travel of the core.

, 5. A device as in claim l, combined with means 95 for withdrawing the table from plate receiving position, and means for locking the table in withdrawn position.

6. In a casting machine for hemispherical plates having a stationary vertical casting mold,

5 and a core traveling from the mold to a plate delivering position and back, the combination of a plate receiving table positioned to be engaged by the core and carried along thereby,

resilient means for opposing such movement of the table, such resilient means holding the table normally at a point near the point of reversal of travel of the core and returning it to normal position as the core retreats.

7. A device as in claim 6, combined with means 6 for withdrawing the table from plate receiving position, and means for locking the table in withdrawn position.

8. In a casting machine for hemispherical plates having a stationary vertical casting mold g and a core traveling from the mold to a plate delivering position and back, the combination of a plate receiving table positioned to be engaged by the core and carried along thereby, resilient means for opposing such movement of the table, such resilient means holding the table normally at a point near the point of reversal of travel of the core and returning it to normal position as the core retreats, the table having a concave margin matching the convex face of the core.

9. A device as in claim 8, combined with means for withdrawing the table from plate receiving position, and means for locking the table in withdrawn position.

' 10. In a casting machine for hemispherical 5" plates having a stationary vertical casting mold and a core traveling from the mold. to a plate delivering position and back, the combination of a plate receiving table positioned to be engaged by the core and carried along thereby,

3.. resilient means for opposing such movement of the table, and resiliently supported plate strippers adjacent the point of reversal of travel of the core, noses on the strippers positioned so as to be pushed out of the way by the approaching g" core and to fall in behind the plate on the core as it passes them,. the travel of the table beingv suificient to cause it to pass underneath the plate as held by the strippers so as to support the plate when freed from the core.

11. A device as in claim 10, combined with means including a rack on the table and an oscillatory toothed member engaging the rack for withdrawing the table from plate receiving position.

12. A device as in claim 10, combined with means for withdrawing the table from plate receiving position, and means for locking the table in withdrawn position.

13. In a casting machine for hemispherical plates having a stationary vertical casting mold, and a core traveling from the mold to a plate delivering position and back, the combination of a plate receiving table positioned to be engaged by the core and carried along thereby, resilient means for opposing such movement of the table, and resiliently supported plate strippers adjacent the point of reversal of travel of the core, noses on the strippers positioned so as to be pushed out of the way by the approaching core and to fall in behind the plate on the core as it passes them, the travel of the table being suffi- 160 cient to cause it to pass underneath the plate as held by the strippers so as to support the plate when freed from the core, said table having a concave margin matching the convex face of the core.

14. A device as in claim 13, combined with means for withdrawing the table from plate receiving position, and means for locking the table in withdrawn position.

15. In a casting machine for hemispherical 11f} plates having a stationary vertical casting mold, and a core traveling from the mold to a plate delivering position and back, the combination of a plate receiving table positioned to be engaged by the core and carried along thereby, resilient 115 means for opposing such movement of the table, and plate strippers positioned to hold the plate in position to be supported by the table when stripped off the core.

16. A device as in claim 13, combined with 120 means including a rack and an oscillatory toothed member engaging the rack for withdrawing the table from plate receiving position.

1'7. A device as in claim 15, combined with means for withdrawing the table from plate receiving position, and means for locking the table in withdrawn position.

18. In a casting machine for hemispherical plates having a stationary vertical casting mold, and a core traveling from the mold to a plate 136 delivering position and back, the combination of a plate receiving table positioned to be engaged by the core and carried along thereby, plate strippers to remove the plate from the core, and means to push the table under the end of the plate.

19. A device as in claim 18, combined with means including a rack and an oscillatory toothed member for reciprocating the rack for withdrawing the table from plate receiving position.

20. A device as in claim 18, combined with means for withdrawing the table from plate receiving position, and means for locking the table in withdrawn position.

HANN S FRITZ. 

